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Finding the Fourth Proportional to 639,738,614.80, 959,607,922.20 and 417,808,853.20

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Solution

The fourth proportional to 639,738,614.80, 959,607,922.20 and 417,808,853.20 is: 626,713,279.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,738,614.80 : 959,607,922.20 = 417,808,853.20 : x
  2. Step 2: Convert to fraction form
    639,738,614.80/959,607,922.20 = 417,808,853.20/x
  3. Step 3: Cross multiply
    639,738,614.80x = 959,607,922.20 × 417,808,853.20
  4. Step 4: Simplify right side
    639,738,614.80x = 400,932,685,496,016,832
  5. Step 5: Solve for x
    x = 400,932,685,496,016,832/639,738,614.80
  6. Step 6: Final answer
    x = 626,713,279.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.